Designed to keep drinks refreshingly cold for up to 12 hours, the Thermos 18-ounce stainless-steel hydration bottle is made with Thermax double-wall vacuum insulation for maximum temperature retention. It"s bpa free, making it a more safe. Made with an unbreakable stainless-steel interior and exterior, the Thermos has a sweat-proof design with a comfortable silicone grip, so it won"t be slippery or leave water rings. A push-button sipper lid has a locking ring to prevent spills, so taking it on the go will be mess free. Ideal for water, iced tea, juices, or sports drinks, the Thermos has an 18-ounce/500ml capacity. It fits most standard car cup holders.